<template>
    <el-row :gutter="20">
        <el-col :span="6">
            <div class="grid-content bg-purple">
                <category @tree-node-click="categoryClick"></category>
            </div>
        </el-col>
        <el-col :span="18">
            <div class="grid-content bg-purple">
                <div class="mod-config">
                    <el-form :inline="true" :model="dataForm" @keyup.enter.native="getDataList()">
                        <el-form-item>
                            <el-input v-model="dataForm.key" placeholder="参数名" clearable></el-input>
                        </el-form-item>
                        <el-form-item>
                            <el-button @click="getDataList()">查询</el-button>
                            <el-button type="success" @click="getAllDataList()">查询全部</el-button>
                            <el-button v-if="isAuth('product:attrgroup:save')" type="primary" @click="addOrUpdateHandle()">
                                新增
                            </el-button>
                            <el-button v-if="isAuth('product:attrgroup:delete')" type="danger" @click="deleteHandle()" :disabled="dataListSelections.length <= 0">
                                批量删除
                            </el-button>
                        </el-form-item>
                    </el-form>
                    <el-table :data="dataList" border v-loading="dataListLoading" @selection-change="selectionChangeHandle" style="width: 100%;">
                        <el-table-column type="selection" header-align="center" align="center" width="50"></el-table-column>
                        <el-table-column prop="attrGroupId" header-align="center" align="center" label="分组id"></el-table-column>
                        <el-table-column prop="attrGroupName" header-align="center" align="center" label="组名"></el-table-column>
                        <el-table-column prop="sort" header-align="center" align="center" label="排序"></el-table-column>
                        <el-table-column prop="descript" header-align="center" align="center" label="描述"></el-table-column>
                        <el-table-column prop="icon" header-align="center" align="center" label="组图标"></el-table-column>
                        <el-table-column prop="catelogId" header-align="center" align="center" label="所属分类id"></el-table-column>
                        <el-table-column fixed="right" header-align="center" align="center" width="150" label="操作">
                            <template slot-scope="scope">
                                <el-button type="text" size="small" @click="relationHandle(scope.row.attrGroupId)">关联</el-button>
                                <el-button type="text" size="small" @click="addOrUpdateHandle(scope.row.attrGroupId)">修改</el-button>
                                <el-button type="text" size="small" @click="deleteHandle(scope.row.attrGroupId)">删除</el-button>
                            </template>
                        </el-table-column>
                    </el-table>
                    <el-pagination
                        @size-change="sizeChangeHandle"
                        @current-change="currentChangeHandle"
                        :current-page="pageIndex"
                        :page-sizes="[10, 20, 50, 100]"
                        :page-size="pageSize"
                        :total="totalPage"
                        layout="total, sizes, prev, pager, next, jumper">
                    </el-pagination>
                    <!-- 弹窗, 新增 / 修改 -->
                    <!-- 会监听 refreshDataList 事件，当监听到之后，就会调用 getDataList 方法重新获取数据列表 -->
                    <add-or-update v-if="addOrUpdateVisible" ref="addOrUpdate" @refreshDataList="getDataList"></add-or-update>
                    <!-- 修改关联关系 -->
                    <relation-update v-if="relationVisible" ref="relationUpdate" @refreshData="getDataList"></relation-update>
                </div>
            </div>
        </el-col>
    </el-row>
</template>

<script>
    /**
     * 父子组件传递数据
     *
     * 1).子组件给父组件传递数据，事件机制：子组件给父组件发送一个事件，携带上数据 this.$emit("事件名", 携带的数据...)
     */
    import Category from '../common/category'
    import AddOrUpdate from './attrgroup-add-or-update'
    import RelationUpdate from "./attr-group-relation";

    export default {
        data () {
            return {
                catId: 0,
                dataForm: {
                    key: ''
                },
                dataList: [],
                pageIndex: 1,
                pageSize: 10,
                totalPage: 0,
                dataListLoading: false,
                dataListSelections: [],
                addOrUpdateVisible: false,
                relationVisible: false
            }
        },
        components: {
            AddOrUpdate, Category, RelationUpdate
        },
        activated () {
            this.getDataList()
        },
        methods: {
            // 处理属性分组与属性的关联
            // 即可以新增和当前属性分组关联的属性，也可以删除和当前属性分组关联的属性
            relationHandle(groupId) {
                this.relationVisible = true;
                this.$nextTick(() => {
                    this.$refs.relationUpdate.init(groupId);
                });
            },
            getAllDataList() {
                this.catId = 0;
                this.getDataList();
            },
            // 获取数据列表
            getDataList () {
                this.dataListLoading = true;
                this.$http({
                    url: this.$http.adornUrl(`/product/attrgroup/list/${this.catId}`),
                    method: 'get',
                    params: this.$http.adornParams({
                        'page': this.pageIndex,
                        'limit': this.pageSize,
                        'key': this.dataForm.key
                    })
                }).then(({data}) => {
                    if (data && data.code === 0) {
                        this.dataList = data.page.list;
                        this.totalPage = data.page.totalCount
                    } else {
                        this.dataList = [];
                        this.totalPage = 0
                    }
                    this.dataListLoading = false
                })
            },
            // 感知 Category 子组件中的树节点被点击
            categoryClick(data, node, component){
                console.log("attrgroup 感知到 category 的节点被点击, ", data, node, component);
                console.log("刚才被点击的菜单名称：", data.name);
                if (node.level === 3){
                    this.catId = data.catId;
                    // 重新查询
                    this.getDataList();
                }
            },
            // 每页数
            sizeChangeHandle (val) {
                this.pageSize = val;
                this.pageIndex = 1;
                this.getDataList();
            },
            // 当前页
            currentChangeHandle (val) {
                this.pageIndex = val;
                this.getDataList();
            },
            // 多选
            selectionChangeHandle (val) {
                this.dataListSelections = val;
            },
            // 新增 / 修改
            addOrUpdateHandle (id) {
                // 将更新或者修改组件设置为可见
                this.addOrUpdateVisible = true;
                // Vue 实现响应式并不是数据发生变化之后 DOM 立即变化，而是按一定的策略进行 DOM 的更新。
                // $nextTick 是在下次 DOM 更新循环结束之后执行延迟回调，在修改数据之后使用 $nextTick，则可以在回调中获取更新后的 DOM
                this.$nextTick(() => {
                    // 在 JavaScript 中需要通过 document.querySelector("#demo") 来获取 dom 节点，然后再获取这个节点的值。在 Vue 中，
                    // 我们不用获取 dom 节点，元素绑定 ref 之后，直接通过 this.$refs 即可调用，这样可以减少获取 dom 节点的消耗。
                    // 通俗的讲，ref 特性就是为元素或子组件赋予一个 ID 引用,通过 this.$refs.refName 来访问元素或子组件的实例
                    // 这里会选中自定义的 addOrUpdate 组件，然后调用其中的 init 方法
                    this.$refs.addOrUpdate.init(id);
                })
            },
            // 删除
            deleteHandle (id) {
                var ids = id ? [id] : this.dataListSelections.map(item => {
                    return item.attrGroupId
                });
                this.$confirm(`确定对[id=${ids.join(',')}]进行[${id ? '删除' : '批量删除'}]操作?`, '提示', {
                    confirmButtonText: '确定',
                    cancelButtonText: '取消',
                    type: 'warning'
                }).then(() => {
                    this.$http({
                        url: this.$http.adornUrl('/product/attrgroup/delete'),
                        method: 'post',
                        data: this.$http.adornData(ids, false)
                    }).then(({data}) => {
                        if (data && data.code === 0) {
                            this.$message({
                                message: '操作成功',
                                type: 'success',
                                duration: 1500,
                                onClose: () => {
                                    this.getDataList()
                                }
                            })
                        } else {
                            this.$message.error(data.msg);
                        }
                    })
                })
            }
        }
    }
</script>

<style scoped>

</style>
